Educational device.



No. 793,767. PATENTED JULY 4, 1905.

' J. P. BURKE.

EDUCATIONAL DEVICE.

APPLICATION FILED O0T.17,1904.

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SPECIFICATION forming part of Letters Patent No. *793,'76"?, dated July4, 1905.

Application filed October 17,1904. Serial No. 228,702.

To all who/1t it um/y concern:

lie it known that 1, James F. BURKE, a citizen of the United States,residing at South lloston, in the county of Sulfolk and State of iili'issachusetts, have invented new and useful improvements inEducational Devices, of which the following is a specification.

This invention relates to an educational device, the object of which isto teach and to impress upon the mind the different subdivisions of thecompass, said device being partici'ilarly useful in schools, colleges,yacht clubs, and, in fact, in any association where a knowledge of thepoints of the compass is desirable.

The invention consists in the combination and arrangement of parts setforth in the fol lowing speciiication, and particularly pointed out inthe claims thereof.

Referring to the drawings, Figure 1 is a plan view of my improvededucational device with the cover of the casing broken away to savespace in the drawings. Fig. 2 is a transverse section taken on line 2 2of Fig. i.

Like numerals refer to like parts throughout the several views of thedrawings.

.ln the drawings, 5 is a casing provided with a hinged cover 6. In theinterior of said casing a disk? is fastened by screws 8 to a flange 9,fast to a shaft '10. The shaft 10 adapted to rotate in bearings 11 12,formed in brackets 13 and 14, respectively, fast to the casing 5. A.worm-gear 15, fast to the shaft l0, meshes into a worm 16, fast to ashaft 17. The shaft 17 is rotatable in bearings 18 19, fast to the sidesof the casing 5, proiects through one side of said casing, and isprovided with a handle 20 upon the exterior of said casing, by means ofwhich it may be conveniently rotated.

The upper face of the disk 7 is provided with the different subdivisions21 21 of the compass. For instance, the disk is divided in by north,east half-north, east. The other three quarters--east to south, south towest, and west to north are also divided into a like number of parts,each part having a name corresponding thereto. Adjacent to the pcripheryof the disk 7 is a stationary indexiii'iger 22, which for convenience isrigidly fastened to one side of the casing 5.

The general operation of the device hereinbofore specifically describedis as follows: W hen the device is used by a teacher :for instructing aclass of pupils, the teacher rotates the handle 20, thus rotating theshaft l7 and through the worm 16 and worm-gear 15 rotating the shaft 10and the diskT attached there to until any desired subdivision upon theupper face of the disk 7 is brought in alinement with the index-linger22, and the pupils then give the name of said subdivision. It is evidentthat the same may be used by pupils in stiulying the subdivisions of thecompass in the manner hereinbefore described by rotating the disk 7until the different subdivisions upon the disk alinc with theindexlingcr in order to test their memory as to said subdivisions.

Having thus described my invention, what ll claim, and desire by LettersPatentto secure, is

1. An educational device comprising in its construction a disk havingupon its upper face the subdivisions of the compass, a sta tioruirysupport upon which said disk is rotatably mounted, and a stationaryindex-linger adjacent to said disk.

2. An educational device comprising in its construction a disk havingupon its up per face the subdivisions of the compass, a rotary shaft towhich said disk is attached, and a sta* tionary index-linger adjacent tosaid disk.

3. An educational device comprising in its construction a disk havingupon its upper face the subdivisions of the compass, a rotary shaft towhich said disk is attached, a stationary index-linger adjacent to saiddisk, and IliOCllftl'liSlU to impart a rotary motion to said shaft.

t. An educational device comprising in its construction a casing, a diskhaving upon its upper face the subdivisions of the compass, a

rotary shaft to which said disk is attached, a stationary index-fingeradjacent to said disk, a second shaft journaled in bearings fast to saidcasing, said shaft projecting through one side of said casing andoutside thereof, a handle fast to the outer end of said shaft, andgearing rotatably connecting said shafts.

In testimony whereof I have hereunto set my hand in presence of twosubscribing Witnesses.

JAMES F. BURKE. W itnesses:

CnARLEs S. GOODING, ANNIE J. DAILEY.

